Attachment means for binder-posts.



R. KRUMMING.

ATTACHMENT MEANS FOR BINDER POSTS.

APPLICATION FILED JANA, 1908.

Patented Sept. 7, 1909.

Witnesses I 4iML.,4w-

monzw. a oluum c0. PKOYo-LIIWJGRAPHERS. WASHINGTON n. c,

55 angles thereto.

UNTTE STS REINI-IOLD KRUMMING, F MILWAUKEE, WISCONSIN.

ATTACHMENT MEANS FOR BINDER-POSTS.

To all whom it may concern:

Be it known that I, REIN HOLD KRUMMING, of Milwaukee, Wisconsin, haveinvented Attachment Means for Binder-Posts, of which 9 the following isa specification.

tion for United States Letters Patent No.

308,168, filed March 26, 1906, which application contains generic claimscovering both forms. As explained in the specification forming a part ofsaid application, the object of such attachment means is to form astronger foundation connection between the post and metal of the back,whereby the post is not subject to sudden breaking off in case ofshocks, as by dropping the book upon the floor; and such attachmentmeans consists,

in general, of two clamping-plates secured to the end of a post orpost-section, with the metal of the binder-back clamped between them,which metal is preferably made of bendable sheet-metal, so that anysidewise jaw upon the post will be relieved by the bending of the backat the base of the post, and not by the breaking of the post itself,which cannot bend. The form of the invention shown in my saidapplication comprises more particularly two flat nuts (which form theaforesaid clamping-plates) screwed upon the end of the post-section withthe metal of the binder-back between them.

The present improved form on the other hand, which forms the subject ofthis application, provides both a simpler, cheaper and strongerattachment means than the thread ed nut, while at the same timepreserving the 4C principle above enunciated.

Coming now to the description of a concrete form, reference is to be hadto the accompanylng drawings, wherein,

Figures 1 to 4 inclusive illustrates a form. for a closed-end post; ofwhich Fig. 1 is an elevation, Fig. 2 a plan, Fig. 3 a longitudinalsection in the plane of Fig. 1, and Fig. 1 a longitudinal section in theplane at rightangles thereto. Fig. 5 to 8 inclusive illus- 5e trate theform to be used for open-ended posts or post-sections; of which Fig. 5is an elevation, Fig. 6 a plan, Fig. 7 a longitudinal section in theplane of Fig. 5, and Fig. 8 a longitudinal section in the plane atright- Figs. 9 and 10 show in perspectivetwo forms of cut-away end ofthe Specification of Letters Patent.

Application filed January 4, 1908.

Patented Sept. '7, 1909.

Serial No. 409,273.

post-section to be attached; Figs. 11 and 12 show in perspective twoforms of clampingplate, the former to be used for either openended orclosed-ended posts, the latter to be used only for closed-ended posts;and Fig. 13 shows an alternative form of the clamping-plate of Fig. 11.Fig. 14k shows an alternative form of perforations for the binderbackfor use where the clamping-plates are dispensed with.

In these drawings every reference letter refers always to the same part.

There are but four parts involved in the structure, to wit, the post A,the binder-back (consisting of sheet-metal) B, and the twocontact-plates, designated C and D respectively.

It will be understood that this attachment means is intended exclusivelyfor posts of the tubular variety, the post A being therefore showntubular and it is made to pass through a hole of the same diameter inthe binder-back B.

The first step in the process of attachment consists in planing off theend of the postsection A on opposite sides as shown in Fig. 9, formingtwo opposite tabs a between which are flats a; or else in cutting atransverse slot or notch a at the end of the post as shown in Fig. 10,forming in this case likewise a pair of upstanding tabs a withintervening flats or shoulders a which serve the same purpose as theflat 0 in 9.

The inside clamping-plate C, Fig. 11, where the form of Fig. 9 of thepost A is used, consists of a disk having a hole 0 which fits thecut-away end of the post, having segmental portions 0 on opposite sideswhich rest upon the flats or shoulders a the latter forming abutmentstherefor. There the form of the post A shown in Fig. 10 is used, theprojection 0 should of course be altered to fit the flats or shoulders64 as shown at c in Fig. 13; or instead thereof, the clamping-plate D,Fig. 12, may be used, which fits inside the cut-away end of the memberA, as clearly shown for example in Fig. 2. For the outsideclamping-plate, Fig. 1, likewiseeither the form C or D may be used; butgenerally speaking, I prefer to use the plate I) for closed-ended posts,as it makes a neater and stronger job in the latter case. The projectingends of the tabs a or a are hammered down and clenched over thesubstance of the outer-clannoing-plate, that is to say, toward theinside where plate D is used, and toward the outside where plate C isused.

In the case of telescoping binder-posts, the inside section is generallymade open at both ends for the insertion of a clamping-screw in thecenter. For this purpose, only the open form of clamping-plate C can beused, as will be obvious. Therefore in this case the projecting ends ofthe tabs a or a must be hammered down outwardly, assuming the form shownin Fig. 6.

This means of attachment forms, as will be obvious a very cheap and verystrong method. I have illustrated herein several of the various formswhich it may take, and it will be readily understood that others may bedevised consistent with the same principles. I do not therefore considermy invention turther restricted than will be obvious from the properscope of my claims.

The hole or aperture in the plate B for the insertion of the post-endshould be made of the same form as the hole 0 in the plate C or C, 6.,with flats c or projections 0 so that the post A is at the same timeprevented from turning relatively to the plate 13.

in smaller binders which have smaller posts and where less strain comesupon the post by reason of the smaller size of the leaves, I find itpracticable to omit the inner plate 0 altogether. the shoulder (l or abeing then brought directly a gainst the face of the plate I). it iseven possible, consistei'itly with the main principle of my invention,to omit both clamping-plates, the ends of the tabs (6 being then turnedover on. the outside of the hole as shown in Fig. 6, directly upon theouter face of the binder-back B. in this ca so however, it would benecessary for practical purposes to make the back B thick to be nolonger bendable.

Vi here two or more posts are fastened to the same binder-be. k, i mayreplace the individual washers or plates C by a single plate havingnon-circular holes punched in it for the posts at the proper intervals;but in this case also the back would. be no longer bendable.

The closed-end form, as shown in Figs. 1 to 4 inclusive is better thanthe open-end form, because in the latter case the tabs are apt to tearat the edges while being bent over, but this is not possible with theclosedend form, and the latter is therefore mucl stronger. improvedmethod of closing theend of a post, replacing soldered plugs and thelike which have been heretofore used.

Where the clamping-plates are dispensed with entirely, as above referredto, I may punch the binder-back with. arcuate slots 7) to receive thetabs 0;, as shown in. Fig. 14. In this case the tabs may be turned overon the inside.

Having thus described my invention, what Moreover it forms a simple andI claim as new and desire to secure by Letters Patent is:

1. An attachment means for binder-posts comprising, in combination, apost-section having the end thereof cut away to torma plurality ofdisconnected upstanding tabs leavin shoulders between them,clampingplate fitting over said cut-away end and having a part thereofabutting agalnst said shoulders, a binder-back fitting over saidcutplate fitting over said cut-away end and having a part thereofabutting against said shoulders, a binder-back fitting over saidcut-away end above said clamping-plate, and a second clamping-platefitting over said binder-back, the projecting ends of said tabs beingturned down over said second clamping plate. i

3. An attachment means for binder-posts comprising, in combination, apost-section having projecting tabs on its end, a clamping-plate securedto said post-section near the base thereof, a binder-back overlying saidclamping-plate, and a second clampingplate overlying said binder-back,the projecting ends of said tabs being turned down over said secondclamping-plate to secure the latter in place.

4t. An attachment means for binder-posts comprising, in. combination, apost or postsection having tabs or extensions on the ends thereof, alaterally extending clamping-member secured to said post or post-sectionat the base thereof and ad acent to the binderback through a hole inwhich the end of said post passes, and a second member overlying saidbinder-back, said tabs being turned down over saidsecond-clampingmember.

5. An attachment means for binder-posts comprising, in combination, apost or postsection having its ends cut away to form independent tabs orextensions alternating ith shoulders, a clamping-member abutting againstsaid shoulders, a binder-back having a hole through which the cut-awayend of said post passes and lying against said clamping-member, and asecond clampingmember overlying said binder-back; said tabs being turneddown over said second 5 clamping-member.

6. .An attachment means for binder-posts comprising, in combination, apost or postsection having its ends cut away to form independent tabs orextensions alternating with shoulders, a clamping-memberabutbinder-posts so ting against said shoulders, a binder-back having ahole through which the cut-away end of said post passes and lyingagainst said clamping-member, and a second clamping-member overlyingsaid binder-back; and

. means securing said tabs to said second clamping-member.

7. An attachment means for binder-posts comprising, in combination, apost or postsection having its end cut away on opposite sides forming apair of independent tabs separated by shoulders at their base, afiattened clamping-member passing over the end of said post and lyingagainst said shoulders as abutment, a binder-back having a hole thereinfitting over the end of said post next above said clamping-member, and asecond clamping-member engaging over the end of said post just abovesaid binder-back, the projecting ends of said tabs being turned downover said second clamping-member.

8. An attachment means for binder-posts comprising in combination a postsection having its end cut away to form projecting tabs separated byopen Spaces, a perforated clamping-member surrounding said post at thebase of said cut-away end and abutting thereupon, and a binder-backhaving a hole through which said cut-away end passes, said hole being ofnon-circular shape to engage said tabs and prevent the post from turningrelative thereto; the ends of said tabs being turned over above saidbinderback to hold it in place.

9. An attachment means for binder-posts comprising, in combination, apost-section having its ends cut away to form projecting tabs separatedby open spaces, a perforated clamping-member surrounding said post atthe base of said cut-away end and abutting thereupon, a binder-backhaving a hole through which said cut-away end passes, said hole being ofnon-circular shape to engage said tabs and prevent the post from turningrelative thereto; and a second clamping-member overlying saidbinderback; the ends of said tabs being turned over and engaging withsaid second clamping-member.

10. An attachment means for binder-posts comprising, in combination, apost-section having its end cut away to form a plurality of disconnectedupstanding tabs leaving shoulders between them, and a binder-back havinga non-circular hole therein, fitting over said cut-away end and abuttingagainst said shoulders, the'ends of said tabs being turned over on theouter side of said binderback.

11. An attachment means for binder-posts comprising, in combination, apost-section having its end cut away to form a plurality of disconnectedupstanding tabs leaving shoulders between them, a binder-back having anon-circular hole therein fitting over said cutaway end and abuttingagainst said shoulders, and a plate having a central bar closing theopening in said post and overlying said binder-back and between saidtabs, the ends of said tabs being turned over on the outer face of saidbinder-back.

- In witness whereof I have hereunto set my hand this thirty-first dayof December,

REINHOLD KRUMMING. Witnesses:

GEORGE WETMORE CoLLEs, MINNIE D. SGHIENBEIN.

